Electrically-driven spindle



l. HURTIG.

I ELECTRlCALLY DRIVEN SPINDLE.

vAPPLlcATHm HLED JAN.B,1919.

1,327,160, Patented Jan. 6, 1920.

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A TTUHNEY l. HURTIG. ELECTHICALLY DRIVEN SPINDLE. APPLlcATloN FILED :AN.8.1919.

1,327,160, Patented Jan. 6, 1920.

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l N V E N TUR doser Hari/G.

GLM

JOSEF HURTIQOF ROCHESTER, NEW YORK.

ELECTRICALLY-DRIVEN SPINDLE.-

Specification of Letters Patent.

Patented Jan. e, i920.`

Application led January 8, 1919.` Serial No. 270,145.

To all whom it. may concern.'

Be it known that I, JOSEF HURTIG, a subject of the Kingdom of Sweden, and a resi dent of the city of Rochester', State of New York, (whose post-oiiice address is corner of Gibbs and Grove streets,) have invented new and useful Improvements in Electrically- Driven spindles, of which the following is a specification. Y

This invention relates to a method of applying an electric motor to fast revolving spindles such as are used in wood working and other similar machines, and it consists mainly in providing' for the easy removal of the spindle and accompanying motor from its supporting yoke, and furthermore in means of concentrically clamping the motor frame and the bearings of the spindle into the supporting yoke: also other vsuitable means for rendering the invention fully operative.

In the accompanying drawings, Figure l, is a front elevation of my device and Fig. 2 is a plan view of the same. Fig. 3 is a central sectional elevation. Fig. a is a sectional outline showing the spindle, its main bearing and the surrounding sleeve partly withdrawn from its working position in the yoke. Fig. 5 is a section at X, Fig. 3, showing the attachment of the motor frame or stator to the yoke. Fig. 6 is a central section of a ball bearing substitute for the main bearing shown in Fig. 3. A is the supporting housing or yoke in which the motor frame or stator B and the spindle bearings C and D are mounted. The spindle bearings may be of any suitable type, such as C which has a conical bore, or D which shows a ball or roller bearing. E is the spindle to which the rotor F is securely attached.

The above refers to a well known construction, but my invention relates to novel details in the construction and assembling of the parts as described below.

By reference to Figs. 3 and 4, it will be seen that the yoke A is bored through longitudinally to form housings for the bearings C and D, and the stator B as shown at 3, 4 and 5, Fig. 4. In the housing section 3 is fitted the sleeve 2, which surrounds and carries the main bearing C. To the underside of this sleeve the cap 6 is secured which forms an oil reservoir, and below this are located the oil guard 7 and the rotor F, both attached to the spindle E. The bearing C,

whether of the, conical type shown in Fig. 3, or the ball or roller type seen in Fig. 6, requires circulating channels for oil which is lifted to the journals by wicks 15 or by some form of oil circulator 16 for the ball bearings: for this purpose I provide return channels 17 which communicate at their lower end with the oil well or chamber 6 thus oil which isv carried up by the wicks or circulaV tor is kept in constant circulation through the oil chamber and passages.

The object of the sleeve 2 surrounding the bearing C is to enlarge the opening 3 suiiiciently to permit the removal of the motor F lengthwise of the yoke A, as indicated in Fig. l where the spindle and attached parts are shown partly withdrawn from the yoke. By this means it is a simple matter to detach the lower bearing D and remove the spindle and rotor whenever it is required for repairs or examination; the outside diameter of the sleeve 2 is such that the stator B can also be removed through the bore 3 of the housing; thus it is plain thatin the fitting up and assembling of the machine, much time can be saved by this method of removal and replacement of parts.

The sleeve 2 is preferably cut through on one side as at 8, Fig. 2, for compression as hereinafter described. For the purpose of clamping the sleeve 2 and stator B Yfirmly into the yoke A, the clamping sections l0 and l1, Fig. l, are cut through on one side as (t 12, Figs. 2 and 5, and clamp bolts 14 are located to draw the joint down and thereby pinch the sleeve and stator tightly into the bores provided for them, which also brings them into exact alinement and co-ncentricity with each other and the spindle: the sleeve 2 is also compressed a trifle by this clamping action, thus clamping the bearing C in position at the same time, all these parts being thus kept in exact alinement as above mentioned: the same is true of the bearing D, the socket for which is bored at the same time as those for the stator and sleeve 2.

What I claim as my invention and desire to secure by Letters Patent is:

l. A high speed spindle having the rotor of a motor securely attached to it, a bearing contiguous to the rotor, a removable sleeve carrying the bearing, a sustaining yoke or housing into which the removable sleeve and the stator of the motor are fitted, whereby rated cylindrical bearing surfaces adapted to be independently contracted and expanded,

of a cylindrical motor stator adapted to 'be' clamped in one of said bearings, a motor rotor, a spindle carrying the rotor, and a removable sleeve in Which'said spindle is rotatably mounted having an external diameter at least equal to that of the stator and adapted to be clamped in the other bearing of the housing.

3. A high speed spindle having an electric rotor attached, a main bearing contiguous thereto, a removable sleeve surrounding said bearing, a yoke or housing fitted to receive saidsleeve and the stator of the motor, and means for clampin@r the bearing, the sleeve and the motor firm y into said housing and concentrically to each other.

4. VvA high speed spindle having a motor rotor attached.,V a bearingl or bearings con- Vtiguous thereto, a removable sleeve surrounding said bearing, a supporting yoke or housingrprovi'ded With cylindrical clamping sections embracing` the sleeve and the motor stator, said sections being out (or split) through on one side and provided With bolts to clamp the parts firmly and concentrically in the housing'.

Y JOSEF HURTIG.

Witnesses:

F. H. CLEMENT, A. C. HETHERLIN. 

